Page 238
STAT
IM 2000/2000S
Service Guide
96-106775 Rev 5.0
11. Steam Generator, Check Valve, Thermal Fuse and Pressure Relief Valve
1. Using a ½” wrench, CAREFULLY unscrew the PRV from the steam generator and remove.
Caution:
On aluminum steam generators that have not had the PRV removed or changed for
some time, removing the prv may damage the internal thread on the steam generator.
In certain circumstances the thread may be recovered using a 1/8” NPT taper tap, but
the steam genrator will need to be removed and inverted to perform this function so that
any debris caused by the re-threading can fall away from the inside of the unit. Under no
circumstances should debris be allowed to enter/remain in the steam generator.
If the thread can not be recovered and correct fitting of the PRV can not be safely assured,
then the complete steam generator should be replaced.
2. If the internal thread is OK, remove any P.T.F.E. tape CAREFULLY with tweezers so that when
the new PRV is inserted the tape debris will not enter the steam generator.
To replace the PRV, proceed as follows:
1. Prepare the new PRV by wrapping the threads with Teflon™ pipe tape in the rotational
direction of the thread. (minimum 4 complete turns).
2. Thread the new PRV into the steam generator by hand.
3. Using the ½” wrench, tighten the PRV until medium resistance is felt.
Ideally a MINIMuM of 4
turns should be achieved. Do not over tighten the new valve.
4. Run a sterilization cycle and observe all fittings and tubes for leaks. Check LCD read-outs for
messages indicating cycle status.
STAT
IM
5000/5000S/5000 G4 Service Guide
